Please help me I’m so confused on how to do this and I only have until Sunday to do this I need answers!

How do businesses a country's economy? a. by investing in goods and services b. by increasing the unemployment rate c. by making profits

Nick has box brads. he uses 4 brads for the first project. nick let’s b represent the original number of brads and finds that for the second project, the number of brads he uses is 8 more than half the difference of b and 4. write an expression to represent the number of brads he uses for the second project.

Free points also plz look my profile and answer really stuff